METHOD FOR WRITING ARBITRARY INDEX PERTURBATIONS ON A WAVEGUIDE - Patent 1095300

(19)

(11)

EP 1 095 300 A1

(12)

(43)	Date of publication:
	02.05.2001 Bulletin 2001/18

(21)	Application number: 99928631.3

(22)	Date of filing: 15.06.1999

(51)	International Patent Classification (IPC)⁷: G02B 6/16

(86)	International application number:
	PCT/US9913/365

(87)	International publication number:
	WO 0002/075 (13.01.2000 Gazette 2000/02)

(84)	Designated Contracting States:
	DE DK FR GB IT

(30)

Priority:

06.07.1998 US 110495

(71)	Applicant: 3M Innovative Properties Company
	Saint Paul, MN 55133-3427 (US)

(72)	Inventors:
	BRENNAN, James, F., III Saint Paul, MN 55133-3427 (US) LABRAKE, Dwayne, L. Saint Paul, MN 55133-3427 (US)

(74)	Representative: Hilleringmann, Jochen et al
	Bahnhofsvorplatz 1,Deichmannhaus 50667 Cologne 50667 Cologne (DE)

(54)	METHOD FOR WRITING ARBITRARY INDEX PERTURBATIONS ON A WAVEGUIDE